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Effect of wellbore storage on the vertical well pressure behavior with threshold pressure gradient in low permeability reservoirs

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Title: Effect of wellbore storage on the vertical well pressure behavior with threshold pressure gradient in low permeability reservoirs

Authors: Yu Long Zhao, Freddy Humberto Escobar, Ahmad Jamili, Guiber Olaya-Marin, Alfredo Ghisays-Ruiz

Journal: ARPN Journal of Engineering and Applied Sciences

HEC Recognition History
Category From To
Y 2023-07-01 2024-09-30
Y 2022-07-01 2023-06-30
Y 2021-07-01 2022-06-30
X 2020-07-01 2021-06-30

Publisher: Khyber Medical College, Peshawar

Country: Pakistan

Year: 2015

Volume: 10

Issue: 22

Language: English

Categories
Wellbore Storage (2) Low Permeability Reservoirs (1) Pressure Behavior (1) Petroleum Engineering (547) Reservoir Engineering (185)

Abstract

An additional pressure gradient is needed in certain low permeability oil formations to enable fluid flow to overcome viscous forces. That minimum pressure gradient has been referred to as the threshold pressure gradient; TPG. This effect is accentuated with the presence of wellbore storage effects. A new model involving wellbore storage effects is developed and presented here along an interpretation technique so the TPG can be easily and accurately estimated from transient pressure analysis and it was successfully tested by means of a synthetic test.

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